Improvement in the manufacture of glassware



D. CHALLINOR. 'Manufacture'of Glassware.

Patented Jan. 8,1878.

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UNITED STATES PATENT OEEICE.

DAVID CHALLINOR, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN THE MANUFACTURE OF GLASSWARE.

Specification forming part of Letters Patent No. 199,030, dated January8, 1878; application filed Deeember 24, 1877.

To all-'whom 'it may concern.'

Be it known that I, DAVID GEALLINOR, of Pittsburg, county of Allegheny,State of Pennsylvania, have invented or discovered a new and usefulImprovement in Manufacture of Hollow Blown Glassware; and I do herebydeclare the following to be a full, clear, concise, and exactdescription thereof, reference being had to the accompanying drawings,making a part of this specication, in whichlike letters indicating likeparts- Figure 1 is a vertical sectional view of apparatus embodying myimprovement in one form of its application, and showing the devices inposition for blowing; and Fig. 2, by a like view, shows the devices inthe position they occupy at the conclusion of the operation, the mold,however, being in both cases shown open and in elevation.

My improvement relates to the making of holes in blown glassware bycausing apunch, mandrel, or other form of perforator to enter theblowing-cavity and pass through the article as blown at the desiredpoint, and while the glass in the path of such perforator still retainsa sufficient degree of plasticity to be perforated without fracture.

I propose to employ this improvement chieily in the manufacture of blownlamp-chimneys, and have illustrated such use in the drawings; but, notlimiting myself in this regard, I claim the novel features, hereinafterset forth, in the manufacture of blown glassware generally, wherein aperforation other than the blowinghole is desired, either in thefinished product or at any stage of its manufacture.

An ordinary stand or table is shown at A. On its upper face is thebase-plate a of an ordinary hinged lamp-chimney blowing-mold, the twohalves of which are shown at B B.

`The lower end of each half of the mold has the usual recess b, which,by its dovetail form fitting on the counter form of the base-plate a,brings both to a common axial line or center.

At c c1 c2 I have shown the cavitiesinwhich to blow the neck, bulb, andbase, respectively, of a lamp-chimney. The usual handles are added, asat d. The operation of blowing is performed in the usual way, except.that, by preference, I rotate the partly-formed chimney in themold-cavity while it is in progress of formation, so as to avoid theobjectionable moldmarks.

The base-cavity c2 differs from the ordinary cavity only in the factthat it is made domeshaped, (inverted,) or nearly so, and at its lowerend terminates in a hole, e, of suitable size for the working therein ofa perforator, s. The latter is made with a stem, s1, of sufficientlength to receive the proper range of motion or length of stroke from alever, g, which latter, operated by the foot of the workman, or in otherconvenient way, is intended to operate, by preference, with a quick blowor stroke like a hammer.

In order to guide the perforator inthe proper path, I make on it aguide, s, which plays Iin a barrel, D, or between equivalentguidingposts. rEhe stem s1, also projecting through a well-tting hole atthe lower end of the barrel D, further facilitates guiding.

With the devices in the position shown in Fig. 1, (except that the twohalves of the mold should be closed together,)the blowingis done asalready stated. As soon as the glass is properly set or hardenedsufficiently to retain its form on the escape of the air, and before theglass at the lower end has become sufficiently chilled to be in dangerof fracture, I cause the perforator s to pierce the base of the domeformed in c?, and thereby make a hole in that, which, when finished,will be the base of the chimney. My chief object in doing this is to getthe product of the blowing operation in such form that by the use of amachine yet to be patented, and with little or no skilledlabor, the baseend so perforated can be opened out and iinished easily, quickly, andcheaply, and with a good nish. The mold is then opened and the productremoved, ready for the next subsequent step, which is the one lastreferred to.

The lever g is preferably counterweighted, as at g', so as to secure thereturnstroke of the perforator.

Various modifications can be made in features of form and constructionwithout any substantial departure from Vthe scope of the presentinvention; and all such modifications as include substantially thefeatures or elements hereinafter claimed ^are expressly ineluded herein.

made to puncture the glass may vary with the purpose for which suchresult is desired.

Also, by varying the form of the cavities, the same elements ofinvention may be made operative in the manufacture of lamp-chimneys ofother forms; or, if desired, the chimney may be blown the other end up,and the top be perforated instead of the base.

Also, I do not limit myself to a dome-shaped cavity for forming the partto be perforated, as other shaped cavities may be employed incombination with a perforator with a like result.

I claim herein as my invention- 1. The inode of making holes inblownglass articles by causing a perforator to puncture the glass whileinclosed in the mold, and while still retaining the proper degree ofplasticity, substantially as set forth.

2. The combination of a perforator and blowing-mold, substantially asand for the purpose set forth.

3. A blowing mold having a suitablyshaped cavity in its lower end, incombination with a perforator capable of motion in the axial line of thecavity, substantially as set forth.

4. The combination of blowing-mold, perforator, stem-guide, andoperating` device, substantially as described.

In testimony whereof I have hereunto set my hand.

DAVID OHALLINOR. Witnesses:

JNO. A. WiLsoN, .GEORGE H. CHRISTY.

